I'm so sorry to hear that you are having such a bad time of it Liam. Is there anything you can think of that might take your mind of it/cheer you up for even a short time? (books, movies, calling a friend, ?) Just give you a little break from all the crap. I know Thursday must seem forever away- would it be possible, probably on Monday morning, to ring and see if you can get an earlier appointment? Can you speak with your family and tell them what a time of it you are having? Would writing about it, either here or just on some paper at home help?
From The Anatomy Of Melancholy; "Look to those you love, and hang on"
My thoughts are with you. X